How the IWC Pilot's Watch Worldtimer Works...The dial shows the current local time. If the wearer passes through one or several time zones, the time can be adjusted forwards or backwards in one-hour steps via the crown to show the new local time, even when crossing the International Date Line. The date simply moves in sync with the jumping hour hand. Once set correctly using the crown, the black-and-white 24-hour ring encircling the dial enables the wearer to read off the time in all 24 time zones. The 23 place names on the external city ring each represent a time zone, and standard time is centered below the name of the city.